add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/linux/rcutree.h
..
..
@@ -60,7 +60,7 @@
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 void exit_rcu(void);
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 void rcu_scheduler_starting(void);
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-extern int rcu_scheduler_active __read_mostly;
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+extern int rcu_scheduler_active;
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 void rcu_end_inkernel_boot(void);
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 bool rcu_inkernel_boot_has_ended(void);
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 bool rcu_is_watching(void);